Triphenylphosphine dibromide

• Catalog No.: A11552
• CAS Number: 1034-39-5
• M. F.: C18H15Br2P
• M. W.: 422.093461
• Purity: 96%

SYNONYMS

• Title: 二溴化三苯基膦
• IUPAC name: bromotriphenylphosphanium bromide
• IUPAC Traditional name: bromotriphenylphosphanium bromide
• Synonyms: Dibromotriphenylphosphorane

DATABASE IDS

• MDL Number: MFCD00000054
• CAS Number: 1034-39-5
• Beilstein Number: 917652
• EC Number: 213-855-1

PROPERTIES

• Purity: 96%
• Melting Point: ca 260°C dec.
• GHS Hazard statements: H314-H318
• European Hazard Symbols: Corrosive (C)
• GHS Precautionary statements: P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501A
• Risk Statements: 34
• Safety Statements: 26-36/37/39-45
• Storage Warning: Moisture Sensitive
• TSCA Listed: 是
• Hazard Class: 8
• UN Number: UN3261
• Packing Group: II

REFERENCES

• The reagent formed with DMSO at low temperatures provides an alternative to the Swern oxidation for selective conversion of alcohols to carbonyl compounds: Tetrahedron Lett., 43, 8355 (2002).
• Reagent for the conversion of alcohols and phenols to bromides in good yields: J. Org. Chem., 37, 626 (1972). Particularly useful for alcohols where sensitive functionality is present: J. Org. Chem., 49, 431 (1984); Synth. Commun., 22, 2945 (1992). Cleaves dialkyl ethers to the two alkyl bromides: J. Am. Chem. Soc., 86, 5037 (1964); J. Org. Chem., 37, 626 (1972).
• Reaction with amines gives iminophosphoranes, which have been used as a means of blocking an amino group to permit monoalkylation: Synthesis, 295 (1980). Iminophosphoranes also undergo a Wittig-like condensation with CO₂ or CS₂ to give the isocyanates or isothiocyanates respectively: Synthesis, 596 (1982):
  
• Ureas are dehydrated to carbodiimides: Liebigs Ann. Chem., 718, 24 (1968); Synthesis, 373 (1981).